FIG. 7.

The cumulative induction time probability, p(t), curves at specific osteopontin concentrations fitted with the single exponential with delay time [Eq. (1)]. The numbers of used droplets is 107, 102, 111, and 105 for concentrations of osteopontin: 0, 1.6 × 10⁻⁸, 3.2 × 10⁻⁸, and 4.8 × 10⁻⁸ M, respectively. The Ca²⁺ and C₂O₄²⁻ concentrations are kept constant at 4.1 × 10⁻⁴ M.